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EMC Installation & Service Guidelines
IMPORTANT NOTE
All JRC equipment and accessories are designed to the highest industry
standards for use in a marine environment. Their design and manufacture
conforms to the appropriate Electro Magnetic Compatibility (EMC) standards,
but good installation is required to ensure that performance is not compromised.
Although every effort has been taken to ensure that the equipment will perform
under all conditions, it is important to understand what factors could affect
operation of the product. Complete installation instructions are provided in
SECTION 2 of this manual. Some preliminary suggestions are made below.
Installation
To avoid the risk of operating problems, all JRC equipment and cables
connected to it should be:
•At least 1m (3 feet) from any equipment transmitting or cables carrying radio
signals e.g. VHF radios, cables and antennas. In the case of SSB radios the
distance should be increased to 2m (7 ft).
•More than 2 m (7 ft) from the path of a radar beam. A radar beam can nor-
mally assume to spread 20 degrees above and below the radiating element.
•The equipment should be supplied from a different battery than the one used
for engine start. Voltage drops below 10.2V in the power supply to our
products can cause the equipment to reset. This will not damage the
equipment, but will cause some loss of information and this can also change the
operating mode.
•Genuine JRC Cables should be used at all times. Cutting and rejoining these
cables can compromise EMC performance and should therefore be avoided
unless doing so is suggested in the installation manual.
Check Before Going to Sea
• Always check the installation before going to sea to make sure that it is not
affected by radio transmissions, engine starting, low battery voltage, or other
problems.
•In some, installations, it may not be possible to prevent the equipment from
being affected by external influences. In general this will not damage the
equipment but it can lead to it resetting, or momentarily may result in faulty
operation. This can then be avoided by turning off the RADAR 1800 prior to
starting the boat engines for instance.
6


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